My grandfather, Theodore Mansfield Crawford, also served in an ammunition train in WWI as a truck driver. (Unfortunately, we just took a photograph of his unit to be framed, so I can't specify which unit he was in -- but I know for certain it was Company B of a 3-- series ammunition train). Grandpa told me that they drove Liberty trucks. Every morning, he said, they would wake up and use cranks to start the engines. In France, this was difficult, as the vehicles were cold in the morning. I thought you might enjoy seeing a picture of one that I took at the Army Transportation Museum at Fort Eustis, Virginia. The museum is very nice -- located about halfway between Richmond and Hampton Roads a couple of miles off the interstate.